Sheet material cutting machine



June 8, 1943.

C. J. JOHNS ON I SHEET MATERIAL CUTTING MACHINE Filed Feb. 11, 1942 s Shets-Sheet 1 Iul'enlor June 8, 1943. c. .1. JOHNSON ,3

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Patented 'June 8, 1943 UNITED STATES PATENT oFF cE 2,321,299 SHEET MATERIAL CUTTING MACHINE Clarence J. Johnson, New Brunswick, N. J. I Application February 11, 1942, Serial No. 430,451 2' Claims. (Cl. 164-435) This invention relates to new and useful improvements in cutting apparatus and more particularly to a machine for cutting sheet materials such as tar paper into strips that may be, used subsequently in the lining of shipping boxes or crates and for-other purposes.

The principal object of the present invention is to provide a sheet material cutting machine of th character stated which in operation may be utilized in cutting a roll of material into a plurality of strips.

Another important object of the invention is to provide a machine of the character stated wherein the parts are so constructed and arranged as to permit ready adjustment of parts to insure cutting of work to the desired dimensions.

Other important objects and advantages of the invention will become apparent to the reader of the following description.

In the drawings:

Figure 1 represents a top plan view of the machine.

Figure 2 is a side elevational view.

Figure 3 is a fragmentary detailed sectional view taken substantially on the line 3-3 of Figure 1 with the cutter shown in section.

Figure 4 is a sectional view taken substantially on the line 4-4 of Figure 3.

Figure 5 is an enlarged sectional view taken substantially on the line 5--5 of Figure 1.

Figure 6 is a sectional view taken substantially on the line 6--6 of Figure 1.

Figure '7 is a cross sectional view similar to that of Figure 6 with several of the bars removed.

Figure 8 is a fragmentary top plan view of one of the cutter guides.

Figure 9 is a fragmentary detailed sectional view disclosing the divider disk.

Figure 10 is a sectional view taken substantially on the line Ill-l0 of Figure 1.

Figure 11 is a perspective view of the removable reel bar.

Figure 12 is a side elevational view of a circular type of cutter without serrations.

Figure 13 is a bar type of cutter which can be used under certain conditions in place of the cutter shown in Figure 12 and in Figure 4.

Referring to the drawings wherein like numerals designate like parts, it can be seen that the machine has a base 5 and corner uprights 6. The uprights 6 support a pair of parallel frame members I, 1 on which sheet paper guide rolls 8 are mounted in a desired number, each of these guide rolls 8 having a peripheral flange 9 at its upper portion to prevent the displacement of the corresponding edge of a sheet therefrom;

Supported by cross members I'll between the frame members I are longitudinally disposed and slightly spaced slats l l which are sufficiently spaced apart to accommodate guide units generally referred to by numeral l2. Each of these guide units 12 comprises a U-shaped frame l3 having a set screw l4 adapted, to regulate the same with respect to an overlying cutter, the frame l3 having a shaft mounted therein carrying a pair of rolls l5, l5 downwardly between which operates the corresponding cutter disk l6.

As can be seen in Figure 1, there is a plurality of cutter units, each of which is generally referred to by numeral ll and each includes a cutter disk It having teeth at its periphery and smooth sides. It will here be observed that the rollers I5, I5 are just above flush with the tops of the slats H and the cutting action on a roll sheet A is of course between theserollers l5, W.

The units I! each consists in construction of a plate Ila which has parallel bars 'l-lb secured-to the top side thereof and to the bottom side of the plate Ila is secured an electric motor 22. Apair of adjacent ends of the bars 11B are provided with bearings 23 which embrace a corresponding cross bar [8 supported at the upper ends of posts l9 which are mounted on the frame members I. The remaining ends of the bars l'lb abut offset leg members 23a of the plate Ila and overlap the next bar H3 in the manner shown in Figure 4. Feedable down through the offset plate portions 23a are set screws 23b each equipped with a jamb nut 23c. Obviously, the use of these set screws 23b is to regulate the position of the corresponding cutter 16 with respect to its guide IL.

The motor 22 has an armature shaft 24 on which one of the cutter disks I6 is mounted-between plates 25, 25.

Brackets 26 extend from the uprights 6 at one end of the machine and each bracket 26 has a cut away portion 21 in which are mounted a pair of rollers 28, 28 and these rollers support the ends of a shaft 29 on which is a roll of tar paper or the like l8. This tar paper sheet I8 is trained over a guide shaft 30 bridging a pair of opposed ends of the frame members I, I.

At this point, it will be observed that the opposite end of the machine from the shaft 30 is provided with a reel structure generally referred to by numeral 3| and this is made up of an elongated shaft 32 having end disks 33 and bars 34 bridging the same, it being observed that one end of the shaft 32 is squared as at 35 to accommodate a crank or other manually operative member, While the other end of the shaft 32 has a clutch element 36 operative within a clutch element 31 carried by a countershaft 38. It can also be seen that in addition to the bars 34 which are secured to the disks 33, there is a slide bar 34a, the same having its side opposed to the reel proper of transverse curvature. One end of this slide bar 34a is provided with an eye 34b or like member which can facilitate removal of the bar from a roll formed on the reel. In starting the strips on the reel 3|, the slide bar 34a is first greased and laid on the free edge portion of the strips between a pair of bars 34. The paper is then wound on the reel, the slide bar 34a serving to define a false carrier bar for the roll of papers, so that when it v is desired to remove the roll or rolls of papers from the reel, the slide bar 34 can be engaged at the eye 34b and pulled out from the roll with the result that the roll will then be sufiiciently loose on the reel to permit easy removal from the reel.

The shaft 32 is journaled through uprights 39, 39, while the shaft 38 isjournaled through uprights 40, 40 located on a side bracket 4|.

Interposed between the uprights 40, 40 is a sleeve 42 having a slot 43 therein and extending through this sleeve 42 and through the uprights 40, 40 is the counter shaft 38 which has its outer end circumferentially grooved to accommodate the tines of a throw fork 44 which is swingably mounted as at 45 on an arm 46 projecting latery from one of the frame members 1. A gear 41 is secured to the barrel 42 and has a worm 48 in mesh therewith, this worm being located on a drive shaft 49 driven by an electric motor 50 supported by a bracket or platform 5| and on this platform is a switch 52 for controlling said motor 50. V

.AS can be seen in Figure 5, a set screw 53 is disposed through the slot 43 andinto the countershaft-38 so that there will be positive connection between the sleeve 42 and the shaft 38 while allowing clutch action of the shaft 38 with respect to the shaft 32 when the throw yok 44 is Opel? ated. As can be seen in Figure 1, a plurality of guide eyes 53 is provided on one side of the machine through which a control rod 54 is disposed, this rod having a handle 55 at one end and being con nected at its opposite end by a pivotal link 56 to the clutch control yoke 44.

For separating the cut strips from the sheet proper, a shaft 56 is mounted slightly under and inwardly of the reel 3| and has an arrangement of sleeves 51, 58 thereon for properly fixing the location of collars 59, 59 between which a separating disk 60 is mounted, this disk operating in a container 6| below the shaft 56 and through a liquid saturated deposit 62. Thus the strip adjacent to the sheet proper is prevented in any way from sticking or binding to the sheet proper as it is rolled onto the reel 3|.

In place of the serrated type of blade shown in Figure 4, a circular blade such as is shown in Figure 12 and denoted by the numeral 60 can be employed, or under certain circumstances a bar type of cutter such as is denoted by numeral 6| in Figure 13 can be utilized.

' While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials maybe resorted to without departing from the spirit and scope of the invention as claimed hereinafter. 1

Having described the invention, what is claimed as new is:

1. A sheet stripping machine comprising a frame, a bed for the frame, elevated cross bars supported by the frame, a carriage, said carriage having one end rockably supported on one cross bar and provided with a yieldable extension for disposition over an adjacent cross bar, and a screw member feedable through'the yieldable extension and adapted to rest on the last-mentioned cross bar, a motor depending from the carriage and a cutter operated by the motor.

2. A sheet stripping machine comprising a slotted bed, a cutter mounted above the bed, a U-shaped frame vertically adjustable in a selected slot of the bed and provided with a pair of closely spaced rollers mounted therein and between which the cutter operates in slitting a sheet.

CLARENCE J. JOHNSON. 

